Definition of dyad noun from the Oxford Advanced Learner's Dictionary

     

    dyad

     noun
    noun
    BrE BrE//ˈdaɪæd//
     
    ; NAmE NAmE//ˈdaɪæd//
     
     
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  1. 1(specialist) something that consists of two parts the mother-child dyad
  2. 2(mathematics) an operator which is the combination of two vectors
  3. Word Origin late 17th cent. (originally denoting the number two or a pair): from late Latin dyas, dyad-, from Greek duas, from duo ‘two’. Current senses date from the late 19th cent.
See the Oxford Advanced American Dictionary entry: dyad